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Win32: Use TLS callback for module initialization and finalization

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TLS callbacks are pretty much like DllMain but work also in
static builds.
This commit is contained in:
Luca Bacci 2025-01-16 18:01:07 +01:00
parent 3bc6b616a4
commit 3921eb96be
1 changed files with 46 additions and 14 deletions
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60
src/win32/cairo-win32-system.c
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@ -80,20 +80,11 @@ _cairo_win32_print_api_error (const char *context, const char *api)
}
#if CAIRO_MUTEX_IMPL_WIN32
#if !CAIRO_WIN32_STATIC_BUILD
/* declare to avoid "no previous prototype for 'DllMain'" warning */
BOOL WINAPI
DllMain (HINSTANCE hinstDLL,
DWORD fdwReason,
LPVOID lpvReserved);
BOOL WINAPI
DllMain (HINSTANCE hinstDLL,
DWORD fdwReason,
LPVOID lpvReserved)
static void NTAPI
cairo_win32_tls_callback (PVOID hinstance, DWORD dwReason, PVOID lpvReserved)
{
switch (fdwReason) {
switch (dwReason) {
case DLL_PROCESS_ATTACH:
CAIRO_MUTEX_INITIALIZE ();
break;
@ -102,9 +93,50 @@ DllMain (HINSTANCE hinstDLL,
CAIRO_MUTEX_FINALIZE ();
break;
}
return TRUE;
}
#ifdef _MSC_VER
#ifdef _M_IX86
# define SYMBOL_PREFIX "_"
#else
# define SYMBOL_PREFIX ""
#endif
#ifdef __cplusplus
# define EXTERN_C_BEGIN extern "C" {
# define EXTERN_C_END }
# define EXTERN_CONST extern const
#else
# define EXTERN_C_BEGIN
# define EXTERN_C_END
# define EXTERN_CONST const
#endif
#define DEFINE_TLS_CALLBACK(func) \
__pragma (section (".CRT$XLD", long, read)) \
\
static void NTAPI func (PVOID, DWORD, PVOID); \
\
EXTERN_C_BEGIN \
__declspec (allocate (".CRT$XLD")) \
EXTERN_CONST PIMAGE_TLS_CALLBACK _ptr_##func = func; \
EXTERN_C_END \
\
__pragma (comment (linker, "/INCLUDE:" SYMBOL_PREFIX "_tls_used")) \
__pragma (comment (linker, "/INCLUDE:" SYMBOL_PREFIX "_ptr_" #func))
#else /* _MSC_VER */
#define DEFINE_TLS_CALLBACK(func) \
static void NTAPI func (PVOID, DWORD, PVOID); \
\
__attribute__ ((used, section (".CRT$XLD"))) \
static const PIMAGE_TLS_CALLBACK _ptr_##func = func;
#endif /* !_MSC_VER */
DEFINE_TLS_CALLBACK (cairo_win32_tls_callback);
#endif /* CAIRO_MUTEX_IMPL_WIN32 */